Effect of yeast extract on speciation and bioavailability of nickel and cobalt in anaerobic bioreactors

Gonzalez-Gil, G.; Jansen, Stefan; Zandvoort, Marcel H.; Leeuwen, Herman P. van

doi:10.1002/bit.10551

Cited by 65 publications

(44 citation statements)

References 27 publications

(27 reference statements)

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“…These findings show that the cause of process instability was linked to poor availability of Co and/or Ni. In accordance with results from previous studies (Barber and Stuckey, 2000;Gonzalez-Gil et al, 2003;Patidar and Tare, 2006), this was likely connected to the high sulfide content in the reactors and metal-sulfide interactions. However, this has to be further investigated to be definitively established.…”

Section: Resultssupporting

confidence: 79%

The feasibility of trace element supplementation for stable operation of wheat stillage-fed biogas tank reactors

Gustavsson

Svensson

Karlsson

2011

Water Science and Technology

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The aim of this study was to investigate the effect of trace element supplementation on operation of wheat stillage-fed biogas tank reactors. The stillage used was a residue from bio-ethanol production, containing high levels of sulfate. In biogas production, high sulfate content has been associated with poor process stability in terms of low methane production and accumulation of process intermediates. However, the results of the present study show that this problem can be overcome by trace element supplementation. Four lab-scale wheat stillage-fed biogas tank reactors were operated for 345 days at a hydraulic retention time of 20 days (37°C). It was concluded that daily supplementation with Co (0.5 mg L -1 ), Ni (0.2 mg L -1 ) and Fe (0.5 g L -1 ) were required for maintaining process stability at the organic loading rate of 4.0 g volatile solids L -1 day -1 .

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Section: Resultssupporting

confidence: 79%

The feasibility of trace element supplementation for stable operation of wheat stillage-fed biogas tank reactors

Gustavsson

Svensson

Karlsson

2011

Water Science and Technology

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“…5,16,54 Hence, mineral addition may be required to sustain microbial growth during the process. To fulfil trace nutrient requirements (ie Fe, Ni, Co), metals are added in excess amounts to ascertain the functioning of the granular sludge reactors in practice.…”

Section: Practical Implication Of Metal Sorptionmentioning

confidence: 99%

Nickel and cobalt sorption on anaerobic granular sludges: kinetic and equilibrium studies

Hullebusch

Zandvoort

Lens

2004

J of Chemical Tech & Biotech

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The kinetics and equilibria of sorption of the divalent metal ions cobalt and nickel onto anaerobic granular sludge are described. Single component and binary equimolar systems were studied at different pH values (pH 6, 7 and 8). The kinetic modelling of metal sorption by anaerobic granular sludge has been carried out using Lagergren equations. On fitting the experimental kinetic data both in firstand pseudo-second-order equations, the regression analysis of a pseudo-second-order equation gave a higher r 2 value, indicating that both external mass transfer and intra-particle diffusion are involved in the sorption process. The experimental isotherm data were analysed using the Langmuir, Freundlich and Redlich-Peterson equations. The Redlich isotherm, a combination of the Langmuir and Freundlich equations, was found to have the highest regression correlation coefficients at pH 7. At pH 8, the Langmuir mechanism dominated for cobalt and nickel adsorption. In contrast, at pH 6, the Freundlich equation gave a better correlation coefficient which suggests a more heterogeneous adsorption at that pH.

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“…Other studies on digestion of potato process waste [13] and on a mixture of fruits, vegetables, meats and fried foods [14] have also suggested improved stability and performance after supplementation with trace elements (Fe, Cu, Zn, Mn, Mo, Co, Al and Se). Supplementation of essential trace elements has been shown to be important to maintain and even stimulate the digestion process in a number of studies [15,16,17,18,19,20,21]. This dependence can be explained by the fact that essential enzymes required for anaerobic biochemical reactions contain metals such as cobalt, nickel, iron, zinc, molybdenum and tungsten, in the form of coenzymes and cofactors.…”

Section: Introductionmentioning

confidence: 99%

Strategies for stable anaerobic digestion of vegetable waste

2012

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International trade and the market demand for pre-prepared agricultural produce is not only increasing the total quantity of waste agricultural biomass but also centralising its availability, making it potentially useful for energy production. The current work considers the suitability of vegetable trimmings and rejects from high-value produce air-freighted between Africa and Europe as a feedstock for anaerobic digestion. The physical and chemical characteristics of a typical mixed vegetable waste of this type were determined and the theoretical energy yield predicted and compared to experimentally-determined calorific values, and to the energy recovered through a batch biochemical methane potential test. A semi-continuous digestion trial was then carried out with daily feed additions at different organic loading rates (OLR). At an OLR of 2 g VS L -1 day -1 the substrate gave a methane yield of 0.345 L g -1 VS added with VS destruction 81.3%, and showed that 76.2% of the measured calorific value of the waste could be reclaimed as methane. This was in good agreement with the estimated energy recovery of 68.6% based on reaction stoichiometry, and was 99% of the biochemical methane potential (BMP). Higher loading rates reduced the specific methane yield and energy conversion efficiency, and led to a drop in digester pH which could not be effectively controlled by alkali additions. To maintain digester stability it was necessary to supplement with additional trace elements including tungsten, which allowed loading rates up to 4 g VS L -1 day -1 to be achieved. Stability was also improved by addition of yeast extract (YE), but the higher gas yield obtained was as a result of the contribution made by the YE and no synergy was shown. Co-digestion using card packaging and cattle slurry as co-substrates also proved to be an effective means of restoring and maintaining stable operating conditions.

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Effect of yeast extract on speciation and bioavailability of nickel and cobalt in anaerobic bioreactors

Cited by 65 publications

References 27 publications

The feasibility of trace element supplementation for stable operation of wheat stillage-fed biogas tank reactors

The feasibility of trace element supplementation for stable operation of wheat stillage-fed biogas tank reactors

Nickel and cobalt sorption on anaerobic granular sludges: kinetic and equilibrium studies

Strategies for stable anaerobic digestion of vegetable waste

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